The magna carta played a key role in the development of the system of checks and balances we use today. what purpose does this system serve? a. it allows any citizen the opportunity to compete for political positions in government. b. it keeps one person or group in government from having too much power. c. it provides a way for government spending to be monitored and shared with the public. d. it requires that each state's electoral votes are based on population to ensure fair elections.